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Web-Dev-Hub-Docs
Tools
Programming Languages
Python
JavaScript
Productivity
Misc
Websites
Backend
Networking
Resources
General Knowledge
Finance
Science & Tech (Innovation)
Reading
Social Media & Trends
Docs
Code Editors & Tools
Cool Stuff
Server-Side
WEB_DEV_TOOLS
DS_ALGOS_BRAINTEASERS
Free-Stuff
Job-Search
General Comp Sci
Blockchain & Crypto
Data Structures & Interviewing
REACT_REVISITED
WEBDEV-Bootcamp-Notes
testing
Medium-articles
🖲
AI
🎙
Audio
My Bash Commands
Resources:
1. Remove spaces from file and
folder names and then remove
numbers from files and folder
names....
Description: need to : sudo apt install rename
sudo apt install rename
Notes: Issue when renaming file without numbers collides with existing file name...
code:
1
find
.
-name "* *"
-type d |
rename
's/ /_/g'
2
find
.
-name "* *"
-type f |
rename
's/ /_/g'
Copied!
1
find
$dir
-type f |
sed
's|\(.*/\)[^A-Z]*\([A-Z].*\)|mv
\"&\"
\"\1\2\"|'
|
sh
2
3
find
$dir
-type d |
sed
's|\(.*/\)[^A-Z]*\([A-Z].*\)|mv
\"&\"
\"\1\2\"|'
|
sh
4
5
for
i
in
*.html;
do
mv
"$i"
"${i%-*}.html";
done
6
7
for
i
in
*.*;
do
mv
"$i"
"${i%-*}.${i##*.}";
done
8
Copied!
Description: combine the contents
of every file in the contaning
directory.
Notes: this includes the contents of the file it's self...
code:
1
//APPEND-DIR.js
2
const
fs =
require('fs');
3
let
cat =
require('child_process')
4
.execSync('cat *')
5
.toString('UTF-8');
6
fs.writeFile('output.md',
cat,
err
=>
{
7
if
(err)
throw
err;
8
});
Copied!
2. Download Website Using
Wget:
Description:
Notes: ==> sudo apt install wget
code:
1
wget --limit-rate=200k
--no-clobber --convert-links
--random-wait -r -p -E -e
robots=off -U mozilla
https://bootcamp42.gitbook.io/python/
Copied!
3. Clean Out Messy Git
Repo:
Description: recursively removes
git related folders as well as
internal use files / attributions in
addition to empty folders
Notes: To clear up clutter in repositories that only get used on your local machine.
code:
1
2
find . -empty -type d -print
-delete
3
4
5
find . \( -name
".git" -o -name
".gitignore" -o -name
".gitmodules" -o -name
".gitattributes" \)
-exec rm -rf -- {} +
6
7
8
find . \( -name
"*SECURITY.txt" -o
-name "*RELEASE.txt"
-o -name
"*CHANGELOG.txt" -o
-name "*LICENSE.txt"
-o -name
"*CONTRIBUTING.txt"
-name "*HISTORY.md" -o
-name "*LICENSE" -o
-name "*SECURITY.md"
-o -name "*RELEASE.md"
-o -name
"*CHANGELOG.md" -o
-name "*LICENSE.md" -o
-name
"*CODE_OF_CONDUCT.md"
-o -name
"*CONTRIBUTING.md" \)
-exec rm -rf -- {} +
Copied!
4. clone all of a user's git
repositories
Description: clone all of a user or
organization's git
repositories.
Notes:
code:
Generalized:
1
2
3
CNTX={users|orgs};
NAME={username|orgname};
PAGE=1
4
curl
"https://api.github.com/$CNTX/$NAME/repos?page=$PAGE&per_page=100"
|
5
grep -e 'git_url*'
|
6
cut -d \" -f 4 |
7
xargs -L1 git clone
Copied!
Clone all Git User
1
CNTX={users};
NAME={bgoonz};
PAGE=1
2
curl
"https://api.github.com/$CNTX/$NAME/repos?page=$PAGE&per_page=200"?branch=master |
3
grep
-e 'git_url*'
|
4
cut
-d \" -f 4
|
5
xargs
-L1 git
clone
Copied!
Clone all Git Organization:
1
CNTX={organizations};
NAME={TheAlgorithms};
PAGE=1
2
curl
"https://api.github.com/$CNTX/$NAME/repos?page=$PAGE&per_page=200"?branch=master
|
3
grep -e 'git_url*'
|
4
cut -d \" -f 4 |
5
xargs -L1 git clone
Copied!
5. Git Workflow
Description:
code:
1
git pull
2
git init
3
git add .
4
git commit
-m"update"
5
git push -u origin master
Copied!
1
git init
2
git add .
3
git commit
-m"update"
4
git push -u origin main
Copied!
1
git init
2
git add .
3
git commit
-m"update"
4
git push -u origin
bryan-guner
Copied!
1
git init
2
git add .
3
git commit
-m"update"
4
git push -u origin
gh-pages
Copied!
1
git init
2
git add .
3
git commit
-m"update"
4
git push -u origin
preview
Copied!
6. Recursive Unzip In Place
Description: recursively unzips
folders and then deletes the zip
file by the same name.
Notes:
code:
1
find . -name "*.zip"
| while read filename; do unzip
-o -d "`dirname
"$filename"`"
"$filename";
done;
2
3
4
5
find . -name "*.zip"
-type f -print -delete
Copied!
7. git pull keeping local
changes:
Description:
Notes:
code:
1
2
git stash
3
git pull
4
git stash pop
Copied!
8. Prettier Code Formatter:
Description:
Notes:
code:
1
sudo npm i prettier -g
2
3
prettier --write .
4
Copied!
9. Pandoc
Description:
Notes:
code:
1
find ./ -iname "*.md"
-type f -exec sh -c 'pandoc
--standalone "${0}" -o
"${0%.md}.html"'
{} \;
2
3
4
5
find ./ -iname
"*.html" -type f -exec
sh -c 'pandoc --wrap=none
--from html --to markdown_strict
"${0}" -o
"${0%.html}.md"'
{} \;
6
7
8
9
find ./ -iname
"*.docx" -type f -exec
sh -c 'pandoc
"${0}" -o
"${0%.docx}.md"'
{} \;
Copied!
10. Gitpod Installs
Description:
Notes:
code:
1
sudo apt install tree
2
sudo apt install pandoc
-y
3
sudo apt install rename
-y
4
sudo apt install black -y
5
sudo apt install wget -y
6
npm i lebab -g
7
npm i prettier -g
8
npm i npm-recursive-install
-g
Copied!
1
black .
2
3
prettier --write .
4
npm-recursive-install
Copied!
11. Repo Utils Package:
Description: my standard repo utis
package
Notes:
code:
1
npm i @bgoonz11/repoutils
Copied!
12. Unix Tree Package
Usage:
Description:
Notes:
code:
1
tree -d -I
'node_modules'
2
3
tree -I
'node_modules'
4
5
tree -f -I
'node_modules'
>TREE.md
6
7
tree -f -L 2
>README.md
8
9
tree -f -I
'node_modules'
>listing-path.md
10
11
12
tree -f -I
'node_modules' -d
>TREE.md
13
14
tree -f >README.md
Copied!
13. Find & Replace string in
file & folder names
recursively..
Description:
Notes:
code:
1
find . -type f -exec rename
's/string1/string2/g'
{} +
2
3
4
find . -type d -exec rename
's/-master//g' {}
+
5
6
7
find . -type f -exec rename
's/\.download//g' {}
+
8
9
10
11
12
find . -type d -exec rename
's/-main//g' {}
+
13
14
15
16
rename
's/\.js\.download$/.js/'
*.js\.download
17
18
19
rename
's/\.html\.markdown$/.md/'
*.html\.markdown
20
21
22
find . -type d -exec rename
's/es6//g' {} +
Copied!
14. Remove double extensions
:
Description:
Notes:
code:
1
#!/bin/bash
2
3
for file in *.md.md
4
do
5
mv "${file}"
"${file%.md}"
6
done
7
8
#!/bin/bash
9
10
for file in *.html.html
11
do
12
mv "${file}"
"${file%.html}"
13
done
Copied!
1
2
#!/bin/bash
3
4
for file in *.html.png
5
do
6
mv "${file}"
"${file%.png}"
7
done
8
9
for file in *.jpg.jpg
10
do
11
mv "${file}"
"${file%.png}"
12
done
Copied!
15. Truncate folder names down to
12 characters:
Description:
Notes:
code:
1
for d in ./*; do mv $d
${d:0:12}; done
Copied!
16.Appendir.js
Description: combine the contents
of every file in the contaning
directory.
Notes: this includes the contents of the file it's self...
code:
1
//APPEND-DIR.js
2
const fs =
require('fs');
3
let cat =
require('child_process')
4
.execSync('cat
*')
5
.toString('UTF-8');
6
fs.writeFile('output.md',
cat, err => {
7
if (err) throw err;
8
});
Copied!
17. Replace space in filename
with underscore
Description: followed by replace '#' with
'_'
in directory name
'#' with
'_'
in directory name
Notes: Can be re-purposed to find and replace any set of strings in file or folder names.
code:
1
find . -name "* *"
-type f | rename
's/_//g'
2
3
find . -name "* *"
-type d | rename
's/#/_/g'
Copied!
18. Filter & delete files by
name and extension
Description:
Notes:
code:
1
find . -name '.bin'
-type d -prune -exec rm -rf
'{}' +
2
3
find . -name '*.html'
-type d -prune -exec rm -rf
'{}' +
4
5
find . -name
'nav-index' -type d
-prune -exec rm -rf
'{}' +
6
7
find . -name
'node-gyp' -type d
-prune -exec rm -rf
'{}' +
8
9
find . -name
'deleteme.txt' -type f
-prune -exec rm -rf
'{}' +
10
11
find . -name
'right.html' -type f
-prune -exec rm -rf
'{}' +
12
13
find . -name
'left.html' -type f
-prune -exec rm -rf
'{}' +
Copied!
19. Remove lines containing
string:
Description:
Notes: Remove lines not containing'.js'
1
sudo sed -i
'/\.js/!d'
./*scrap2.md
Copied!
code:
1
sudo sed -i
'/githubusercontent/d'
./*sandbox.md
2
3
4
sudo sed -i
'/githubusercontent/d'
./*scrap2.md
5
6
7
8
sudo sed -i
'/github\.com/d'
./*out.md
9
10
11
sudo sed -i
'/author/d' ./*
Copied!
20. Remove duplicate lines from a
text file
Description:
Notes: //...syntax of uniq...// $uniq [OPTION] [INPUT[OUTPUT]] The syntax of this is quite easy to understand. Here, INPUT refers to the input file in which repeated lines need to be filtered out and if INPUT isn’t specified then uniq reads from the standard input. OUTPUT refers to the output file in which you can store the filtered output generated by uniq command and as in case of INPUT if OUTPUT isn’t specified then uniq writes to the standard output.
Now, let’s understand the use of this
with the help of an example. Suppose
you have a text file named kt.txt
which contains repeated lines that
needs to be omitted. This can simply
be done with uniq.
code:
1
sudo apt install uniq
2
uniq -u input.txt
output.txt
Copied!
21. Remove lines containing
string:
Description:
Notes:
code:
1
sudo sed -i
'/githubusercontent/d'
./*sandbox.md
2
3
4
sudo sed -i
'/githubusercontent/d'
./*scrap2.md
5
6
7
sudo sed -i
'/github\.com/d'
./*out.md
8
9
---
10
title: add_days
11
tags: date,intermediate
12
firstSeen:
2020-10-28T16:19:04+02:00
13
lastUpdated:
2020-10-28T16:19:04+02:00
14
---
15
16
sudo sed -i
'/title:/d'
./*output.md
17
sudo sed -i
'/firstSeen/d'
./*output.md
18
sudo sed -i
'/lastUpdated/d'
./*output.md
19
sudo sed -i
'/tags:/d'
./*output.md
20
21
sudo sed -i
'/badstring/d'
./*
22
23
24
sudo sed -i
'/stargazers/d'
./repo.txt
25
sudo sed -i
'/node_modules/d'
./index.html
26
sudo sed -i
'/right\.html/d'
./index.html
27
sudo sed -i
'/right\.html/d'
./right.html
28
Copied!
22. Zip directory excluding .git
and node_modules all the way down
(Linux)
Description:
Notes:
code:
1
2
#!/bin/bash
3
TSTAMP=`date
'+%Y%m%d-%H%M%S'`
4
zip -r $1.$TSTAMP.zip $1 -x
"**.git/*" -x
"**node_modules/*"
`shift; echo
[email protected];`
5
6
printf "\nCreated:
$1.$TSTAMP.zip\n"
7
8
# usage:
9
# - zipdir thedir
10
# - zip thedir -x
"**anotherexcludedsubdir/*"
(important the double quotes to
prevent glob expansion)
11
12
# if in windows/git-bash, add
'zip' command this
way:
13
#
https://stackoverflow.com/a/55749636/1482990
Copied!
23. Delete files containing a
certain string:
Description:
Notes:
code:
1
find . | xargs grep -l
www.redhat.com | awk
'{print "rm
"$1}' >
doit.sh
2
vi doit.sh // check for murphy
and his law
3
source doit.sh
Copied!
24.
Description:
Notes:
code:
1
#!/bin/sh
2
3
# find ./ | grep -i "\.*quot;
>files
4
find ./ | sed -E -e 's/([^
]+[ ]+){8}//' | grep -i
"\.*quot;>files
5
listing="files"
6
7
out=""
8
9
html="sitemap.html"
10
out="basename
$out.html"
11
html="sitemap.html"
12
cmd() {
13
14
echo ' <!DOCTYPE
html>'
15
echo
'<html>'
16
echo
'<head>'
17
18
echo ' <meta
http-equiv="Content-Type"
content="text/html">'
19
20
echo ' <meta
name="Author"
content="Bryan
Guner">'
21
echo '<link
rel="stylesheet"
href="./assets/prism.css">'
22
echo ' <link
rel="stylesheet"
href="./assets/style.css">'
23
echo ' <script async
defer
src="./assets/prism.js"></script>'
24
25
echo " <title>
directory
</title>"
26
echo '<link
rel="stylesheet"
href="https://cdn.jsdelivr.net/gh/bgoonz/GIT-CDN-FILES/mdn-article.css">'
27
echo '<link
rel="stylesheet"
href="https://cdn.jsdelivr.net/gh/bgoonz/GIT-CDN-FILES/markdown-to-html-style.css">'
28
echo ""
29
echo
'<style>'
30
31
32
echo ' a {'
33
echo ' color:
black;'
34
echo ' }'
35
echo ''
36
echo ' li {'
37
echo ' border: 1px solid
black !important;'
38
echo ' font-size:
20px;'
39
echo ' letter-spacing:
0px;'
40
echo ' font-weight:
700;'
41
echo ' line-height:
16px;'
42
echo ' text-decoration:
none !important;'
43
echo ' text-transform:
uppercase;'
44
echo ' background:
#194ccdaf
!important;'
45
echo ' color: black
!important;'
46
echo ' border:
none;'
47
echo ' cursor:
pointer;'
48
echo ' justify-content:
center;'
49
echo ' padding: 30px
60px;'
50
echo ' height:
48px;'
51
echo ' text-align:
center;'
52
echo ' white-space:
normal;'
53
echo ' border-radius:
10px;'
54
echo ' min-width:
45em;'
55
echo ' padding: 1.2em 1em
0;'
56
echo ' box-shadow: 0 0
5px;'
57
echo ' margin:
1em;'
58
echo ' display:
grid;'
59
echo '
-webkit-border-radius:
10px;'
60
echo ' -moz-border-radius:
10px;'
61
echo ' -ms-border-radius:
10px;'
62
echo ' -o-border-radius:
10px;'
63
echo ' }'
64
echo '
</style>'
65
echo
'</head>'
66
67
echo
'<body>'
68
69
echo ""
70
71
# continue with the HTML
stuff
72
73
echo ""
74
75
echo ""
76
77
echo
"<ul>"
78
79
awk '{print
"<li><a
href=\""$1"\">",$1," </a></li>"}'
$listing
80
81
# awk '{print
"<li>"};
82
83
# {print " <a
href=\""$1"\">",$1,"</a></li> "}'
\ $listing
84
85
echo ""
86
87
echo
"</ul>"
88
89
echo
"</body>"
90
91
echo
"</html>"
92
93
}
94
95
cmd $listing --sort=extension
>>$html
Copied!
25. Index of Iframes
Description: Creates an index.html
file that contains all the files in
the working directory or any of
it's sub folders as iframes
instead of anchor tags.
Notes: Useful Follow up Code:
1
2
Copied!
code:
1
2
#!/bin/sh
3
4
# find ./ | grep -i "\.*quot;
>files
5
find ./ | sed -E -e 's/([^
]+[ ]+){8}//' | grep -i
"\.*quot;>files
6
listing="files"
7
8
out=""
9
10
html="index.html"
11
out="basename
$out.html"
12
html="index.html"
13
cmd() {
14
15
echo ' <!DOCTYPE
html>'
16
echo
'<html>'
17
echo
'<head>'
18
19
echo ' <meta
http-equiv="Content-Type"
content="text/html">'
20
21
echo ' <meta
name="Author"
content="Bryan
Guner">'
22
echo '<link
rel="stylesheet"
href="./assets/prism.css">'
23
echo ' <link
rel="stylesheet"
href="./assets/style.css">'
24
echo ' <script async
defer
src="./assets/prism.js"></script>'
25
26
echo " <title>
directory
</title>"
27
28
echo ""
29
echo
'<style>'
30
31
32
echo ' a {'
33
echo ' color:
black;'
34
echo ' }'
35
echo ''
36
echo ' li {'
37
echo ' border: 1px solid
black !important;'
38
echo ' font-size:
20px;'
39
echo ' letter-spacing:
0px;'
40
echo ' font-weight:
700;'
41
echo ' line-height:
16px;'
42
echo ' text-decoration:
none !important;'
43
echo ' text-transform:
uppercase;'
44
echo ' background:
#194ccdaf
!important;'
45
echo ' color: black
!important;'
46
echo ' border:
none;'
47
echo ' cursor:
pointer;'
48
echo ' justify-content:
center;'
49
echo ' padding: 30px
60px;'
50
echo ' height:
48px;'
51
echo ' text-align:
center;'
52
echo ' white-space:
normal;'
53
echo ' border-radius:
10px;'
54
echo ' min-width:
45em;'
55
echo ' padding: 1.2em 1em
0;'
56
echo ' box-shadow: 0 0
5px;'
57
echo ' margin:
1em;'
58
echo ' display:
grid;'
59
echo '
-webkit-border-radius:
10px;'
60
echo ' -moz-border-radius:
10px;'
61
echo ' -ms-border-radius:
10px;'
62
echo ' -o-border-radius:
10px;'
63
echo ' }'
64
echo '
</style>'
65
echo
'</head>'
66
67
echo
'<body>'
68
69
echo ""
70
71
# continue with the HTML
stuff
72
73
echo ""
74
75
echo ""
76
77
echo
"<ul>"
78
79
awk '{print
"<iframe
src=\""$1"\">","</iframe>"}'
$listing
80
81
# awk '{print
"<li>"};
82
83
# {print " <a
href=\""$1"\">",$1,"</a></li> "}'
\ $listing
84
85
echo ""
86
87
echo
"</ul>"
88
89
echo
"</body>"
90
91
echo
"</html>"
92
93
}
94
95
cmd $listing --sort=extension
>>$html
Copied!
26. Filter Corrupted Git Repo For
Troublesome File:
Description:
Notes:
code:
1
git filter-branch
--index-filter 'git rm -r
--cached --ignore-unmatch
assets/_index.html' HEAD
Copied!
27. OVERWRITE LOCAL
CHANGES:
Description:
Important: If you have any local
changes, they will be lost. With or
without --hard option, any local
commits that haven't been pushed
will be lost.[*] If you have any files
that are not tracked by Git (e.g.
uploaded user content), these files
will not be affected.
Notes: First, run a fetch to update all origin/ refs to latest:
code:
1
git fetch --all
2
# Backup your current
branch:
3
4
git branch backup-master
5
# Then, you have two
options:
6
7
git reset --hard
origin/master
8
# OR If you are on some other
branch:
9
10
git reset --hard
origin/<branch_name>
11
# Explanation:
12
# git fetch downloads the
latest from remote without
trying to merge or rebase
anything.
13
14
# Then the git reset resets the
master branch to what you just
fetched. The --hard option
changes all the files in your
working tree to match the files
in origin/master
15
git fetch --all
16
git reset --hard
origin/master
Copied!
28. Remove Submodules:
Description: To remove a submodule
you need to:
Notes:
Delete the relevant section from the .gitmodules file. Stage the .gitmodules changes git add .gitmodules Delete the relevant section from .git/config. Run git rm --cached path_to_submodule (no trailing slash). Run rm -rf .git/modules/path_to_submodule (no trailing slash). Commit git commit -m "Removed submodule " Delete the now untracked submodule files rm -rf path_to_submodule
code:
1
git submodule deinit
Copied!
29. GET GISTS
Description:
Notes:
code:
1
sudo apt install wget
2
3
4
5
wget -q -O -
https://api.github.com/users/bgoonz/gists
| grep raw_url | awk -F\"
'{print $4}' | xargs
-n3 wget
6
7
8
wget -q -O -
https://api.github.com/users/amitness/gists
| grep raw_url | awk -F\"
'{print $4}' | xargs
-n3 wget
9
10
11
wget -q -O -
https://api.github.com/users/drodsou/gists
| grep raw_url | awk -F\"
'{print $4}' | xargs
-n1 wget
12
13
wget -q -O -
https://api.github.com/users/thomasmb/gists
| grep raw_url | awk -F\"
'{print $4}' | xargs
-n1 wget
Copied!
30. Remove Remote OriginL
Description:
Notes:
code:
1
git remote remove origin
Copied!
31. just clone .git folder:
Description:
Notes:
code:
1
2
git clone --bare
--branch=master --single-branch
https://github.com/bgoonz/My-Web-Dev-Archive.git
Copied!
32. Undo recent pull
request:
Description:
Notes:
code:
1
git reset --hard
[email protected]{"10 minutes ago"}
Copied!
33. Lebab
Description: ES5 --> ES6
Notes:
code:
1
# Safe:
2
3
lebab --replace ./ --transform
arrow
4
lebab --replace ./ --transform
arrow-return
5
lebab --replace ./ --transform
for-of
6
lebab --replace ./ --transform
for-each
7
lebab --replace ./ --transform
arg-rest
8
lebab --replace ./ --transform
arg-spread
9
lebab --replace ./ --transform
obj-method
10
lebab --replace ./ --transform
obj-shorthand
11
lebab --replace ./ --transform
multi-var
12
13
14
# ALL:
15
16
17
lebab --replace ./ --transform
obj-method
18
lebab --replace ./ --transform
class
19
lebab --replace ./ --transform
arrow
20
lebab --replace ./ --transform
let
21
lebab --replace ./ --transform
arg-spread
22
lebab --replace ./ --transform
arg-rest
23
lebab --replace ./ --transform
for-each
24
lebab --replace ./ --transform
for-of
25
lebab --replace ./ --transform
commonjs
26
lebab --replace ./ --transform
exponent
27
lebab --replace ./ --transform
multi-var
28
lebab --replace ./ --transform
template
29
lebab --replace ./ --transform
default-param
30
lebab --replace ./ --transform
destruct-param
31
lebab --replace ./ --transform
includes
32
lebab --replace ./ --transform
obj-method
33
lebab --replace ./ --transform
class
34
lebab --replace ./ --transform
arrow
35
lebab --replace ./ --transform
arg-spread
36
lebab --replace ./ --transform
arg-rest
37
lebab --replace ./ --transform
for-each
38
lebab --replace ./ --transform
for-of
39
lebab --replace ./ --transform
commonjs
40
lebab --replace ./ --transform
exponent
41
lebab --replace ./ --transform
multi-var
42
lebab --replace ./ --transform
template
43
lebab --replace ./ --transform
default-param
44
lebab --replace ./ --transform
destruct-param
45
lebab --replace ./ --transform
includes
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34. Troubleshoot Ubuntu
Input/Output Error
Description: Open Powershell as
Administrator...
Notes:
code:
1
wsl.exe --shutdown
2
3
Get-Service LxssManager |
Restart-Service
Copied!
35. Export Medium as
Markdown
Description:
Notes:
code:
1
npm i mediumexporter -g
2
3
4
mediumexporter
https://medium.com/codex/fundamental-data-structures-in-javascript-8f9f709c15b4
>ds.md
Copied!
36. Delete files in violation of
a given size range (100MB for
git)
Description:
Notes:
code:
1
find . -size +75M -a -print -a
-exec rm -f {} \;
2
3
4
5
6
find . -size +98M -a -print -a
-exec rm -f {} \;
Copied!
37. download all links of given
file type
Description:
Notes:
code:
1
2
wget -r -A.pdf
https://overapi.com/git
Copied!
38. Kill all node processes
Description:
Notes:
code:
1
killall -s KILL node
Copied!
39. Remove string from file names
recursively
Description: In the example below I
am using this command to remove the
string "-master" from all
file names in the working directory
and all of it's sub
directories.
code:
1
find <mydir> -type f
-exec sed -i
's/<string1>/<string2>/g'
{} +
2
3
4
5
6
find . -type f -exec rename
's/-master//g' {}
+
Copied!
Notes: The same could be done for folder names by changing the -type f flag (for file) to a -type d flag (for directory)
1
find <mydir> -type d
-exec sed -i
's/<string1>/<string2>/g'
{} +
2
3
4
5
6
find . -type d -exec rename
's/-master//g' {}
+
Copied!
40. Remove spaces from file and
folder names recursively
Description: replaces spaces in
file and folder names with an _
underscore
_
underscore
Notes: need to runsudo apt install renameto use this command
code:
1
find . -name "* *"
-type d | rename 's/
/_/g'
2
find . -name "* *"
-type f | rename 's/
/_/g'
Copied!
41. Zip Each subdirectories in a
given directory into their own zip
file
Description:
Notes:
code:
1
for i in */; do zip -r
"${i%/}.zip"
"$i"; done
Copied!
42.
Description:
Notes:
code:
1
Copied!
43.
Description:
Notes:
code:
1
Copied!
44.
Description:
Notes:
code:
1
Copied!
45.
Description:
Notes:
code:
1
Copied!
46.
Description:
Notes:
code:
1
Copied!
47.
Description:
Notes:
code:
1
Copied!
48.
Description:
Notes:
code:
1
Copied!
49.
Description:
Notes:
code:
1
Copied!
50.
Description:
Notes:
code:
1
Copied!
51.
Description:
Notes:
code:
1
Copied!
52.
Description:
Notes:
code:
1
Copied!
53.
Description:
Notes:
code:
1
Copied!
54.
Description:
Notes:
code:
1
Copied!
55.
Description:
Notes:
code:
1
Copied!
56.
Description:
Notes:
code:
1
Copied!
57.
Description:
Notes:
code:
1
Copied!
58.
Description:
Notes:
code:
1
Copied!
59.
Description:
Notes:
code:
1
Copied!
60.
Description:
Notes:
code:
1
Copied!
61.
Description:
Notes:
code:
1
Copied!
62.
Description:
Notes:
code:
1
Copied!
63.
Description:
Notes:
code:
1
Copied!
64.
Description:
Notes:
code:
1
Copied!
65.
Description:
Notes:
code:
1
Copied!
66.
Description:
Notes:
code:
1
Copied!
67.
Description:
Notes:
code:
1
Copied!
68.
Description:
Notes:
code:
1
Copied!
69.
Description:
Notes:
code:
1
Copied!
70.
Description:
Notes:
code:
1
Copied!
71.
Description:
Notes:
code:
1
Copied!
72.
Description:
Notes:
code:
1
Copied!
73.
Description:
Notes:
code:
1
Copied!
74.
Description:
Notes:
code:
1
Copied!
75.
Description:
Notes:
code:
1
Copied!
76.
Description:
Notes:
code:
1
Copied!
77.
Description:
Notes:
code:
1
Copied!
78.
Description:
Notes:
code:
1
Copied!
79.
Description:
Notes:
code:
1
Copied!
80.
Description:
Notes:
code:
1
Copied!
81.
Description:
Notes:
code:
1
Copied!
82.
Description:
Notes:
code:
1
Copied!
83.
Description:
Notes:
code:
1
Copied!
84.
Description:
Notes:
code:
1
Copied!
85.
Description:
Notes:
code:
1
Copied!
86.
Description:
Notes:
code:
1
Copied!
87.
Description:
Notes:
code:
1
Copied!
88.
Description:
Notes:
code:
1
Copied!
89.
Description:
Notes:
code:
1
Copied!
90.
Description:
Notes:
code:
1
Copied!
91. Unzip PowerShell
Description:
Notes:
code:
1
PARAM (
2
[string] $ZipFilesPath =
"./",
3
[string] $UnzipPath =
"./RESULT"
4
)
5
6
$Shell = New-Object -com
Shell.Application
7
$Location =
$Shell.NameSpace($UnzipPath)
8
9
$ZipFiles = Get-Childitem
$ZipFilesPath -Recurse -Include
*.ZIP
10
11
$progress = 1
12
foreach ($ZipFile in $ZipFiles)
{
13
Write-Progress -Activity
"Unzipping to
$($UnzipPath)"
-PercentComplete (($progress /
($ZipFiles.Count + 1)) * 100)
-CurrentOperation
$ZipFile.FullName -Status
"File $($Progress) of
$($ZipFiles.Count)"
14
$ZipFolder =
$Shell.NameSpace($ZipFile.fullname)
15
16
17
$Location.Copyhere($ZipFolder.items(),
1040) # 1040 - No msgboxes to
the user -
http://msdn.microsoft.com/en-us/library/bb787866%28VS.85%29.aspx
18
$progress++
19
}
Copied!
92. return to bash from zsh
Description:
Notes:
code:
1
sudo apt --purge remove
zsh
Copied!
93. Symbolic Link
Description: to working
directory
Notes:
code:
1
ln -s "$(pwd)"
~/NameOfLink
2
3
ln -s "$(pwd)"
~/Downloads
Copied!
94. auto generate readme
Description: rename existing readme
to blueprint.md
Notes:
code:
1
npx @appnest/readme generate
Copied!
95. Log into postgres:
Description:
Notes:
code:
1
sudo -u postgres psql
Copied!
96. URL To Subscribe To YouTube
Channel
Description:
Notes:
code:
1
https://www.youtube.com/channel/UC1HDa0wWnIKUf-b4yY9JecQ?sub_confirmation=1
Copied!
97. Embed Repl.it In Medium
Post:
code:
1
https://repl.it/@bgoonz/Data-Structures-Algos-Codebase?lite=true&referrer=https%3A%2F%2Fbryanguner.medium.com
2
3
4
https://repl.it/@bgoonz/node-db1-project?lite=true&referrer=https%3A%2F%2Fbryanguner.medium.com
5
6
https://repl.it/@bgoonz/interview-prac?lite=true&referrer=https%3A%2F%2Fbryanguner.medium.com
7
8
9
https://repl.it/@bgoonz/Database-Prac?lite=true&referrer=https%3A%2F%2Fbryanguner.medium.com
Copied!
98.
Description:
Notes:
code:
1
2
find . -name *right.html -type
f -exec sed -i
's/target="_parent"//g'
{} +
3
4
5
find . -name *right.html -type
f -exec sed -i
's/target="_parent"//g'
{} +
Copied!
99. Cheat Sheet
Description:
Notes:
code:
1
#!/bin/bash
2
##############################################################################
3
# SHORTCUTS and HISTORY
4
##############################################################################
5
6
CTRL+A # move to beginning of
line
7
CTRL+B # moves backward one
character
8
CTRL+C # halts the current
command
9
CTRL+D # deletes one character
backward or logs out of current
session, similar to exit
10
CTRL+E # moves to end of
line
11
CTRL+F # moves forward one
character
12
CTRL+G # aborts the current
editing command and ring the
terminal bell
13
CTRL+H # deletes one character
under cursor (same as
DELETE)
14
CTRL+J # same as RETURN
15
CTRL+K # deletes (kill) forward
to end of line
16
CTRL+L # clears screen and
redisplay the line
17
CTRL+M # same as RETURN
18
CTRL+N # next line in command
history
19
CTRL+O # same as RETURN, then
displays next line in history
file
20
CTRL+P # previous line in
command history
21
CTRL+Q # resumes suspended
shell output
22
CTRL+R # searches
backward
23
CTRL+S # searches forward or
suspends shell output
24
CTRL+T # transposes two
characters
25
CTRL+U # kills backward from
point to the beginning of
line
26
CTRL+V # makes the next
character typed verbatim
27
CTRL+W # kills the word behind
the cursor
28
CTRL+X # lists the possible
filename completions of the
current word
29
CTRL+Y # retrieves (yank) last
item killed
30
CTRL+Z # stops the current
command, resume with fg in the
foreground or bg in the
background
31
32
ALT+B # moves backward one
word
33
ALT+D # deletes next word
34
ALT+F # moves forward one
word
35
ALT+H # deletes one character
backward
36
ALT+T # transposes two
words
37
ALT+. # pastes last word from
the last command. Pressing it
repeatedly traverses through
command history.
38
ALT+U # capitalizes every
character from the current
cursor position to the end of
the word
39
ALT+L # uncapitalizes every
character from the current
cursor position to the end of
the word
40
ALT+C # capitalizes the letter
under the cursor. The cursor
then moves to the end of the
word.
41
ALT+R # reverts any changes to
a command you’ve pulled from
your history if you’ve edited
it.
42
ALT+? # list possible
completions to what is
typed
43
ALT+^ # expand line to most
recent match from history
44
45
CTRL+X then ( # start recording
a keyboard macro
46
CTRL+X then ) # finish
recording keyboard macro
47
CTRL+X then E # recall last
recorded keyboard macro
48
CTRL+X then CTRL+E # invoke
text editor (specified by
$EDITOR) on current command line
then execute resultes as shell
commands
49
50
BACKSPACE # deletes one
character backward
51
DELETE # deletes one character
under cursor
52
53
history # shows command line
history
54
!! # repeats the last
command
55
!<n> # refers to command
line 'n'
56
!<string> # refers to
command starting with
'string'
57
58
exit # logs out of current
session
59
60
61
##############################################################################
62
# BASH BASICS
63
##############################################################################
64
65
env # displays all environment
variables
66
67
echo $SHELL # displays the
shell you're using
68
echo $BASH_VERSION # displays
bash version
69
70
bash # if you want to use bash
(type exit to go back to your
previously opened shell)
71
whereis bash # locates the
binary, source and manual-page
for a command
72
which bash # finds out which
program is executed as
'bash' (default:
/bin/bash, can change across
environments)
73
74
clear # clears content on
window (hide displayed
lines)
75
76
77
##############################################################################
78
# FILE COMMANDS
79
##############################################################################
80
81
82
ls # lists your files in
current directory, ls
<dir> to print files in a
specific directory
83
ls -l # lists your files in
'long format', which
contains the exact size of the
file, who owns the file and who
has the right to look at it, and
when it was last modified
84
ls -a # lists all files in
'long format',
including hidden files (name
beginning with
'.')
85
ln -s <filename>
<link> # creates symbolic
link to file
86
readlink <filename> #
shows where a symbolic links
points to
87
tree # show directories and
subdirectories in easilly
readable file tree
88
mc # terminal file explorer
(alternative to ncdu)
89
touch <filename> #
creates or updates (edit) your
file
90
mktemp -t <filename> #
make a temp file in /tmp/ which
is deleted at next boot (-d to
make directory)
91
cat <filename> # prints
file raw content (will not be
interpreted)
92
any_command >
<filename> #
'>' is used to
perform redirections, it will
set any_command's stdout to
file instead of "real
stdout" (generally
/dev/stdout)
93
more <filename> # shows
the first part of a file (move
with space and type q to
quit)
94
head <filename> # outputs
the first lines of file
(default: 10 lines)
95
tail <filename> # outputs
the last lines of file (useful
with -f option) (default: 10
lines)
96
vim <filename> # opens a
file in VIM (VI iMproved) text
editor, will create it if it
doesn't exist
97
mv <filename1>
<dest> # moves a file to
destination, behavior will
change based on 'dest'
type (dir: file is placed into
dir; file: file will replace
dest (tip: useful for
renaming))
98
cp <filename1>
<dest> # copies a
file
99
rm <filename> # removes a
file
100
find . -name <name>
<type> # searches for a
file or a directory in the
current directory and all its
sub-directories by its
name
101
diff <filename1>
<filename2> # compares
files, and shows where they
differ
102
wc <filename> # tells you
how many lines, words and
characters there are in a file.
Use -lwc (lines, word,
character) to ouput only 1 of
those informations
103
sort <filename> # sorts
the contents of a text file line
by line in alphabetical order,
use -n for numeric sort and -r
for reversing order.
104
sort -t -k <filename> #
sorts the contents on specific
sort key field starting from 1,
using the field separator
t.
105
rev # reverse string characters
(hello becomes olleh)
106
chmod -options <filename>
# lets you change the read,
write, and execute permissions
on your files (more infos: SUID,
GUID)
107
gzip <filename> #
compresses files using gzip
algorithm
108
gunzip <filename> #
uncompresses files compressed by
gzip
109
gzcat <filename> # lets
you look at gzipped file without
actually having to gunzip
it
110
lpr <filename> # prints
the file
111
lpq # checks out the printer
queue
112
lprm <jobnumber> #
removes something from the
printer queue
113
genscript # converts plain text
files into postscript for
printing and gives you some
options for formatting
114
dvips <filename> # prints
.dvi files (i.e. files produced
by LaTeX)
115
grep <pattern>
<filenames> # looks for
the string in the files
116
grep -r <pattern>
<dir> # search recursively
for pattern in directory
117
head -n file_name | tail +n #
Print nth line from file.
118
head -y lines.txt | tail +x #
want to display all the lines
from x to y. This includes the
xth and yth lines.
119
120
121
##############################################################################
122
# DIRECTORY COMMANDS
123
##############################################################################
124
125
126
mkdir <dirname> # makes a
new directory
127
rmdir <dirname> # remove
an empty directory
128
rmdir -rf <dirname> #
remove a non-empty
directory
129
mv <dir1> <dir2> #
rename a directory from
<dir1> to
<dir2>
130
cd # changes to home
131
cd .. # changes to the parent
directory
132
cd <dirname> # changes
directory
133
cp -r <dir1> <dir2>
# copy <dir1> into
<dir2> including
sub-directories
134
pwd # tells you where you
currently are
135
cd ~ # changes to home.
136
cd - # changes to previous
working directory
137
138
##############################################################################
139
# SSH, SYSTEM INFO &
NETWORK COMMANDS
140
##############################################################################
141
142
143
ssh
[email protected]
# connects to host as user
144
ssh -p <port>
[email protected]
# connects to host on specified
port as user
145
ssh-copy-id
[email protected]
# adds your ssh key to host for
user to enable a keyed or
passwordless login
146
147
whoami # returns your
username
148
passwd # lets you change your
password
149
quota -v # shows what your disk
quota is
150
date # shows the current date
and time
151
cal # shows the month's
calendar
152
uptime # shows current
uptime
153
w # displays whois online
154
finger <user> # displays
information about user
155
uname -a # shows kernel
information
156
man <command> # shows the
manual for specified
command
157
df # shows disk usage
158
du <filename> # shows the
disk usage of the files and
directories in filename (du -s
give only a total)
159
last <yourUsername> #
lists your last logins
160
ps -u yourusername # lists your
processes
161
kill <PID> # kills the
processes with the ID you
gave
162
killall <processname> #
kill all processes with the
name
163
top # displays your currently
active processes
164
lsof # lists open files
165
bg # lists stopped or
background jobs ; resume a
stopped job in the
background
166
fg # brings the most recent job
in the foreground
167
fg <job> # brings job to
the foreground
168
169
ping <host> # pings host
and outputs results
170
whois <domain> # gets
whois information for
domain
171
dig <domain> # gets DNS
information for domain
172
dig -x <host> # reverses
lookup host
173
wget <file> # downloads
file
174
175
time <command> # report
time consumed by command
execution
176
177
178
##############################################################################
179
# VARIABLES
180
##############################################################################
181
182
183
varname=value # defines a
variable
184
varname=value command # defines
a variable to be in the
environment of a particular
subprocess
185
echo $varname # checks a
variable's value
186
echo $ # prints process ID of
the current shell
187
echo $! # prints process ID of
the most recently invoked
background job
188
echo $? # displays the exit
status of the last command
189
read <varname> # reads a
string from the input and
assigns it to a variable
190
read -p "prompt"
<varname> # same as above
but outputs a prompt to ask user
for value
191
column -t <filename> #
display info in pretty columns
(often used with pipe)
192
let <varname> =
<equation> # performs
mathematical calculation using
operators like +, -, *, /,
%
193
export VARNAME=value # defines
an environment variable (will be
available in subprocesses)
194
195
array[0]=valA # how to define
an array
196
array[1]=valB
197
array[2]=valC
198
array=([2]=valC [0]=valA
[1]=valB) # another way
199
array=(valA valB valC) # and
another
200
201
${array[i]} # displays
array's value for this
index. If no index is supplied,
array element 0 is assumed
202
${#array[i]} # to find out the
length of any element in the
array
203
${#array[@]} # to find out how
many values there are in the
array
204
205
declare -a # the variables are
treated as arrays
206
declare -f # uses function
names only
207
declare -F # displays function
names without definitions
208
declare -i # the variables are
treated as integers
209
declare -r # makes the
variables read-only
210
declare -x # marks the
variables for export via the
environment
211
212
${varname:-word} # if varname
exists and isn't null,
return its value; otherwise
return word
213
${varname:word} # if varname
exists and isn't null,
return its value; otherwise
return word
214
${varname:=word} # if varname
exists and isn't null,
return its value; otherwise set
it word and then return its
value
215
${varname:?message} # if
varname exists and isn't
null, return its value;
otherwise print varname,
followed by message and abort
the current command or
script
216
${varname:+word} # if varname
exists and isn't null,
return word; otherwise return
null
217
${varname:offset:length} #
performs substring expansion. It
returns the substring of
$varname starting at offset and
up to length characters
218
219
${variable#pattern} # if the
pattern matches the beginning of
the variable's value,
delete the shortest part that
matches and return the
rest
220
${variable##pattern} # if the
pattern matches the beginning of
the variable's value,
delete the longest part that
matches and return the
rest
221
${variable%pattern} # if the
pattern matches the end of the
variable's value, delete
the shortest part that matches
and return the rest
222
${variable%%pattern} # if the
pattern matches the end of the
variable's value, delete
the longest part that matches
and return the rest
223
${variable/pattern/string} #
the longest match to pattern in
variable is replaced by string.
Only the first match is
replaced
224
${variable//pattern/string} #
the longest match to pattern in
variable is replaced by string.
All matches are replaced
225
226
${#varname} # returns the
length of the value of the
variable as a character
string
227
228
*(patternlist) # matches zero
or more occurrences of the given
patterns
229
+(patternlist) # matches one or
more occurrences of the given
patterns
230
?(patternlist) # matches zero
or one occurrence of the given
patterns
231
@(patternlist) # matches
exactly one of the given
patterns
232
!(patternlist) # matches
anything except one of the given
patterns
233
234
$(UNIX command) # command
substitution: runs the command
and returns standard
output
235
236
237
##############################################################################
238
# FUNCTIONS
239
##############################################################################
240
241
242
# The function refers to passed
arguments by position (as if
they were positional
parameters), that is, $1, $2,
and so forth.
243
#
[email protected]
is equal to "$1"
"$2"...
"$N", where N is the
number of positional parameters.
$# holds the number of
positional parameters.
244
245
246
function functname() {
247
shell commands
248
}
249
250
unset -f functname # deletes a
function definition
251
declare -f # displays all
defined functions in your login
session
252
253
254
##############################################################################
255
# FLOW CONTROLS
256
##############################################################################
257
258
259
statement1 &&
statement2 # and operator
260
statement1 || statement2 # or
operator
261
262
-a # and operator inside a test
conditional expression
263
-o # or operator inside a test
conditional expression
264
265
# STRINGS
266
267
str1 == str2 # str1 matches
str2
268
str1 != str2 # str1 does not
match str2
269
str1 < str2 # str1 is less
than str2 (alphabetically)
270
str1 > str2 # str1 is
greater than str2
(alphabetically)
271
str1 \> str2 # str1 is
sorted after str2
272
str1 \< str2 # str1 is
sorted before str2
273
-n str1 # str1 is not null (has
length greater than 0)
274
-z str1 # str1 is null (has
length 0)
275
276
# FILES
277
278
-a file # file exists or its
compilation is successful
279
-d file # file exists and is a
directory
280
-e file # file exists; same
-a
281
-f file # file exists and is a
regular file (i.e., not a
directory or other special type
of file)
282
-r file # you have read
permission
283
-s file # file exists and is
not empty
284
-w file # your have write
permission
285
-x file # you have execute
permission on file, or directory
search permission if it is a
directory
286
-N file # file was modified
since it was last read
287
-O file # you own file
288
-G file # file's group ID
matches yours (or one of yours,
if you are in multiple
groups)
289
file1 -nt file2 # file1 is
newer than file2
290
file1 -ot file2 # file1 is
older than file2
291
292
# NUMBERS
293
294
-lt # less than
295
-le # less than or equal
296
-eq # equal
297
-ge # greater than or
equal
298
-gt # greater than
299
-ne # not equal
300
301
if condition
302
then
303
statements
304
[elif condition
305
then statements...]
306
[else
307
statements]
308
fi
309
310
for x in {1..10}
311
do
312
statements
313
done
314
315
for name [in list]
316
do
317
statements that can use
$name
318
done
319
320
for (( initialisation ; ending
condition ; update ))
321
do
322
statements...
323
done
324
325
case expression in
326
pattern1 )
327
statements ;;
328
pattern2 )
329
statements ;;
330
esac
331
332
select name [in list]
333
do
334
statements that can use
$name
335
done
336
337
while condition; do
338
statements
339
done
340
341
until condition; do
342
statements
343
done
344
345
##############################################################################
346
# COMMAND-LINE PROCESSING
CYCLE
347
##############################################################################
348
349
350
# The default order for command
lookup is functions, followed by
built-ins, with scripts and
executables last.
351
# There are three built-ins
that you can use to override
this order: `command`, `builtin`
and `enable`.
352
353
command # removes alias and
function lookup. Only built-ins
and commands found in the search
path are executed
354
builtin # looks up only
built-in commands, ignoring
functions and commands found in
PATH
355
enable # enables and disables
shell built-ins
356
357
eval # takes arguments and run
them through the command-line
processing steps all over
again
358
359
360
##############################################################################
361
# INPUT/OUTPUT
REDIRECTORS
362
##############################################################################
363
364
365
cmd1|cmd2 # pipe; takes
standard output of cmd1 as
standard input to cmd2
366
< file # takes standard
input from file
367
> file # directs standard
output to file
368
>> file # directs
standard output to file; append
to file if it already
exists
369
>|file # forces standard
output to file even if noclobber
is set
370
n>|file # forces output to
file from file descriptor n even
if noclobber is set
371
<> file # uses file as
both standard input and standard
output
372
n<>file # uses file as
both input and output for file
descriptor n
373
n>file # directs file
descriptor n to file
374
n<file # takes file
descriptor n from file
375
n>>file # directs file
description n to file; append to
file if it already exists
376
n>& # duplicates
standard output to file
descriptor n
377
n<& # duplicates
standard input from file
descriptor n
378
n>&m # file descriptor n
is made to be a copy of the
output file descriptor
379
n<&m # file descriptor n
is made to be a copy of the
input file descriptor
380
&>file # directs
standard output and standard
error to file
381
<&- # closes the
standard input
382
>&- # closes the
standard output
383
n>&- # closes the ouput
from file descriptor n
384
n<&- # closes the input
from file descripor n
385
386
|tee <file># output
command to both terminal and a
file (-a to append to
file)
387
388
389
##############################################################################
390
# PROCESS HANDLING
391
##############################################################################
392
393
394
# To suspend a job, type CTRL+Z
while it is running. You can
also suspend a job with
CTRL+Y.
395
# This is slightly different
from CTRL+Z in that the process
is only stopped when it attempts
to read input from
terminal.
396
# Of course, to interrupt a
job, type CTRL+C.
397
398
myCommand & # runs job in
the background and prompts back
the shell
399
400
jobs # lists all jobs (use with
-l to see associated PID)
401
402
fg # brings a background job
into the foreground
403
fg %+ # brings most recently
invoked background job
404
fg %- # brings second most
recently invoked background
job
405
fg %N # brings job number
N
406
fg %string # brings job whose
command begins with string
407
fg %?string # brings job whose
command contains string
408
409
kill -l # returns a list of all
signals on the system, by name
and number
410
kill PID # terminates process
with specified PID
411
kill -s SIGKILL 4500 # sends a
signal to force or terminate the
process
412
kill -15 913 # Ending PID 913
process with signal 15
(TERM)
413
kill %1 # Where %1 is the
number of job as read from
'jobs' command.
414
415
ps # prints a line of
information about the current
running login shell and any
processes running under it
416
ps -a # selects all processes
with a tty except session
leaders
417
418
trap cmd sig1 sig2 # executes a
command when a signal is
received by the script
419
trap "" sig1 sig2 #
ignores that signals
420
trap - sig1 sig2 # resets the
action taken when the signal is
received to the default
421
422
disown <PID|JID> #
removes the process from the
list of jobs
423
424
wait # waits until all
background jobs have
finished
425
sleep <number> # wait #
of seconds before
continuing
426
427
pv # display progress bar for
data handling commands. often
used with pipe like |pv
428
yes # give yes response
everytime an input is requested
from script/process
429
430
431
##############################################################################
432
# TIPS & TRICKS
433
##############################################################################
434
435
436
# set an alias
437
cd; nano .bash_profile
438
> alias gentlenode='ssh
[email protected]
-p 3404' # add your alias
in .bash_profile
439
440
# to quickly go to a specific
directory
441
cd; nano .bashrc
442
> shopt -s cdable_vars
443
> export
websites="/Users/mac/Documents/websites"
444
445
source .bashrc
446
cd $websites
447
448
449
##############################################################################
450
# DEBUGGING SHELL
PROGRAMS
451
##############################################################################
452
453
454
bash -n scriptname # don't
run commands; check for syntax
errors only
455
set -o noexec # alternative
(set option in script)
456
457
bash -v scriptname # echo
commands before running
them
458
set -o verbose # alternative
(set option in script)
459
460
bash -x scriptname # echo
commands after command-line
processing
461
set -o xtrace # alternative
(set option in script)
462
463
trap 'echo $varname'
EXIT # useful when you want to
print out the values of
variables at the point that your
script exits
464
465
function errtrap {
466
es=$?
467
echo "ERROR line $1:
Command exited with status
$es."
468
}
469
470
trap 'errtrap
$LINENO' ERR # is run
whenever a command in the
surrounding script or function
exits with non-zero status
471
472
function dbgtrap {
473
echo "badvar is
$badvar"
474
}
475
476
trap dbgtrap DEBUG # causes the
trap code to be executed before
every statement in a function or
script
477
# ...section of code in which
the problem occurs...
478
trap - DEBUG # turn off the
DEBUG trap
479
480
function returntrap {
481
echo "A return
occurred"
482
}
483
484
trap returntrap RETURN # is
executed each time a shell
function or a script executed
with the . or source commands
finishes executing
485
486
##############################################################################
487
# COLORS AND BACKGROUNDS
488
##############################################################################
489
# note: \e or \x1B also work
instead of \033
490
# Reset
491
Color_Off='\033[0m' #
Text Reset
492
493
# Regular Colors
494
Black='\033[0;30m' #
Black
495
Red='\033[0;31m' #
Red
496
Green='\033[0;32m' #
Green
497
Yellow='\033[0;33m' #
Yellow
498
Blue='\033[0;34m' #
Blue
499
Purple='\033[0;35m' #
Purple
500
Cyan='\033[0;36m' #
Cyan
501
White='\033[0;97m' #
White
502
503
# Additional colors
504
LGrey='\033[0;37m' #
Ligth Gray
505
DGrey='\033[0;90m' #
Dark Gray
506
LRed='\033[0;91m' #
Ligth Red
507
LGreen='\033[0;92m' #
Ligth Green
508
LYellow='\033[0;93m'#
Ligth Yellow
509
LBlue='\033[0;94m' #
Ligth Blue
510
LPurple='\033[0;95m'#
Light Purple
511
LCyan='\033[0;96m' #
Ligth Cyan
512
513
514
# Bold
515
BBlack='\033[1;30m' #
Black
516
BRed='\033[1;31m' #
Red
517
BGreen='\033[1;32m' #
Green
518
BYellow='\033[1;33m'#
Yellow
519
BBlue='\033[1;34m' #
Blue
520
BPurple='\033[1;35m'#
Purple
521
BCyan='\033[1;36m' #
Cyan
522
BWhite='\033[1;37m' #
White
523
524
# Underline
525
UBlack='\033[4;30m' #
Black
526
URed='\033[4;31m' #
Red
527
UGreen='\033[4;32m' #
Green
528
UYellow='\033[4;33m'#
Yellow
529
UBlue='\033[4;34m' #
Blue
530
UPurple='\033[4;35m'#
Purple
531
UCyan='\033[4;36m' #
Cyan
532
UWhite='\033[4;37m' #
White
533
534
# Background
535
On_Black='\033[40m' #
Black
536
On_Red='\033[41m' #
Red
537
On_Green='\033[42m' #
Green
538
On_Yellow='\033[43m'#
Yellow
539
On_Blue='\033[44m' #
Blue
540
On_Purple='\033[45m'#
Purple
541
On_Cyan='\033[46m' #
Cyan
542
On_White='\033[47m' #
White
543
544
# Example of usage
545
echo -e "${Green}This is
GREEN text${Color_Off} and
normal text"
546
echo -e
"${Red}${On_White}This is
Red test on White
background${Color_Off}"
547
# option -e is mandatory, it
enable interpretation of
backslash escapes
548
printf "${Red} This is red
\n"
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Contents
Resources:
1. Remove spaces from file and folder names and then
remove numbers from files and folder names....
2. Download Website Using Wget:
3. Clean Out Messy Git Repo:
4. clone all of a user's git repositories
Generalized:
Clone all Git User
Clone all Git Organization:
5. Git Workflow
6. Recursive Unzip In Place
7. git pull keeping local changes:
8. Prettier Code Formatter:
9. Pandoc
10. Gitpod Installs
11. Repo Utils Package:
12. Unix Tree Package Usage:
13. Find & Replace string in file & folder
names recursively..
14. Remove double extensions :
15. Truncate folder names down to 12 characters:
16.Appendir.js
17. Replace space in filename with underscore
18. Filter & delete files by name and extension
19. Remove lines containing string:
20. Remove duplicate lines from a text file
21. Remove lines containing string:
22. Zip directory excluding .git and node_modules
all the way down (Linux)
23. Delete files containing a certain string:
24.
25. Index of Iframes
26. Filter Corrupted Git Repo For Troublesome File:
27. OVERWRITE LOCAL CHANGES:
28. Remove Submodules:
29. GET GISTS
30. Remove Remote OriginL
31. just clone .git folder:
32. Undo recent pull request:
33. Lebab
34. Troubleshoot Ubuntu Input/Output Error
35. Export Medium as Markdown
36. Delete files in violation of a given size range
(100MB for git)
37. download all links of given file type
38. Kill all node processes
39. Remove string from file names recursively
40. Remove spaces from file and folder names
recursively
41. Zip Each subdirectories in a given directory
into their own zip file
42.
43.
44.
45.
46.
47.
48.
49.
50.
51.
52.
53.
54.
55.
56.
57.
58.
59.
60.
61.
62.
63.
64.
65.
66.
67.
68.
69.
70.
71.
72.
73.
74.
75.
76.
77.
78.
79.
80.
81.
82.
83.
84.
85.
86.
87.
88.
89.
90.
91. Unzip PowerShell
92. return to bash from zsh
93. Symbolic Link
94. auto generate readme
95. Log into postgres:
96. URL To Subscribe To YouTube Channel
97. Embed Repl.it In Medium Post:
98.
99. Cheat Sheet